Features: -No need to use WiFi signal, which makes it safer and prevents potential hacker attacks. Thanks to the advanced 2.4G dedicated protocol, you can use it with confidence. -Equipped with a 4.3-inch IPS screen, it provides a clear and visible panoramic view from any angle. Built-in infrared night vision function, you can always see it, whether it is day or night. -When someone rings the doorbell, long press the talk button to initiate a call through the intercom. Normally, the intercom is in standby mode. -It supports up to 128GB TF card (not included). When the card is inserted, it will automatically save photos and record videos. -Cordless installation is adopted, so it can be used normally without interference even in power outage. Specifications: Colour: black Size: 11.7*9.3*1.8cm 4.8*8.7*2.5cm Material: plastic Package Included: 1x Display screen 1x Doorbell 1x 3M sticker 1x Back plate 1x Screw pack 1x USB charging cable 1x Instruction manual